145407231 has 10 divisors (see below), whose sum is σ = 217213392. Its totient is φ = 96938100.

The previous prime is 145407217. The next prime is 145407257. The reversal of 145407231 is 132704541.

It is not a de Polignac number, because 145407231 - 2¹⁹ = 144882943 is a prime.

It is a super-2 number, since 2×145407231² = 42286525654174722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 145407195 and 145407204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145407281) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 897495 + ... + 897656.

Almost surely, 2^145407231 is an apocalyptic number.

145407231 is a deficient number, since it is larger than the sum of its proper divisors (71806161).

145407231 is an equidigital number, since it uses as much as digits as its factorization.

145407231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795163 (or 1795154 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 145407231 is about 12058.4920699066. The cubic root of 145407231 is about 525.8501491142.

The spelling of 145407231 in words is "one hundred forty-five million, four hundred seven thousand, two hundred thirty-one".